Metric UM2 Filament Straightener

MendellS' Straightener modified for metric machine screws, and common bearings

3D printer parts and enhancements

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Based on original design: UM2 Filament Straightener by MendellS


Liked the idea of a filament straightener.

Modified to suit bearings (696ZZ) and machine screws (M5 button cap) to hand ( these are a sloppy fit in the bearings inner diameter before some insulation tape packing; ideally you would have M6 button caps in the 6mm internal diameter bearings :o) )

Original parts are included as they are imported into the openSCAD files for the modifications.

Materials and methods


1 base (with or without filament guide)

3 pulleys to suit the external diameter of your bearings

Parts printed in PLA
0.1 mm layers without support

Dot 3mf files are print orientation.

*Other parts*

M3x30 machine screws to attach to the feeder's motor; quantity 2

M5 / M6 button cap machine screws (10mm or longer); quantity 3

625ZZ / 696ZZ ball bearings for pulleys; quantity 3



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51d182ced9e0d0efff5b4c72bddad7eb?default=blank&size=40maccew added this to the 3dprinter collection ago
Mini reiner 001 2Reiner BΓΌhl added this to the Ultimaker2 collection ago
Mini 80803fac5ad4e5387010ac16a91f0428cn published this design ago